Finding the Fourth Proportional to 5,278,840.84, 7,915,374.68 and 4,191,609.70
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Solution
The fourth proportional to 5,278,840.84, 7,915,374.68 and 4,191,609.70 is: 6,285,122.50
Step by Step Solution
- Step 1: Write the proportion equation
5,278,840.84 : 7,915,374.68 = 4,191,609.70 : x - Step 2: Convert to fraction form
5,278,840.84/7,915,374.68 = 4,191,609.70/x - Step 3: Cross multiply
5,278,840.84x = 7,915,374.68 × 4,191,609.70 - Step 4: Simplify right side
5,278,840.84x = 33,178,161,299,111.39 - Step 5: Solve for x
x = 33,178,161,299,111.39/5,278,840.84 - Step 6: Final answer
x = 6,285,122.50
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Double scale
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.